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avformat/matroskadec: workaround the field_order bug in the Matroska muxer

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2016-10-13 14:22:07 -03:00
parent 04b0792e4a
commit 1273bc6d26
1 changed files with 11 additions and 4 deletions
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15
libavformat/matroskadec.c
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@ -1752,8 +1752,15 @@ static int matroska_parse_flac(AVFormatContext *s,
return 0;
}
static int mkv_field_order(int64_t field_order)
static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
{
int major, minor, micro, bttb = 0;
/* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
* this function, and fixed in 57.52 */
if (sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
switch (field_order) {
case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
return AV_FIELD_PROGRESSIVE;
@ -1764,9 +1771,9 @@ static int mkv_field_order(int64_t field_order)
case MATROSKA_VIDEO_FIELDORDER_BB:
return AV_FIELD_BB;
case MATROSKA_VIDEO_FIELDORDER_BT:
return AV_FIELD_BT;
return bttb ? AV_FIELD_TB : AV_FIELD_BT;
case MATROSKA_VIDEO_FIELDORDER_TB:
return AV_FIELD_TB;
return bttb ? AV_FIELD_BT : AV_FIELD_TB;
default:
return AV_FIELD_UNKNOWN;
}
@ -2282,7 +2289,7 @@ static int matroska_parse_tracks(AVFormatContext *s)
st->codecpar->height = track->video.pixel_height;
if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
st->codecpar->field_order = mkv_field_order(track->video.field_order);
st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
st->codecpar->field_order = AV_FIELD_PROGRESSIVE;